you pressed just once - or you think you did. but you actually had a press, a<br>
release, and a press , release etc. again because your pressure went above,<br>
below and above the &quot;pressure level&quot; needed to register a click.<br>
</blockquote><div> <br>What&#39;s the &quot;pressure level&quot;? Is it in the the hardware? Is it possible to adjust it?<br></div></div>